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Jim Yu commented on HARMONY-6303:
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Can anybody apply the patch if there is no problem? Thanks!
> [JDWP] Fix a potential crash problem that would happen if String object is GCed
> -------------------------------------------------------------------------------
>
> Key: HARMONY-6303
> URL: https://issues.apache.org/jira/browse/HARMONY-6303
> Project: Harmony
> Issue Type: Bug
> Components: JDK
> Affects Versions: 5.0M10
> Reporter: Jim Yu
> Fix For: 5.0M11
>
> Attachments: HARMONY-6303.diff
>
>
> I found there was a potential crash problem in StringReference command set, Value command.
In the statement [1] as following shows, if the string object for which we are trying to read
its ID has been GCed actually, the string ID we retrieved would be null as a result. Hence
if we pass the null value to the follwing jni invocations [2], crash would happen. The solution
is that we should return the error code to the upper level when the string object is GCed
in this case.
> [1] jstring stringObject = m_cmdParser->command.ReadStringID(jni);
> [2] jsize len = jni->GetStringLength(stringObject);
> jsize utfLen = jni->GetStringUTFLength(stringObject);
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